Libros, Capítulos y Monografías – Departamento de Agronomíahttp://dspace.uclv.edu.cu:8089/handle/123456789/8974
Libros, Capítulos y Monografías publicados por personal afiliado al Departamento de AgronomíaMon, 21 Jan 2019 22:17:02 GMT2019-01-21T22:17:02ZEffect of Soil Management on Suppressions of Rhizoctonia solani in Agroecosystems of Santa Clara, Cuba.http://dspace.uclv.edu.cu:8089/handle/123456789/10430
Effect of Soil Management on Suppressions of Rhizoctonia solani in Agroecosystems of Santa Clara, Cuba.
Hernández Arboláez, Héctor Pablo; Aguila Alcantara, Edith
Freyer, Bernhard; Tielkes, Eric
Disease suppression can be seen as a feature to determine healthy soil. From an ecological
standpoint, soil health implies ecosystem stability, diversity, functional connectivity
and resilience in response to a disturbance or stress. Previously suggested
indicators to evaluate soil health and disease suppression have been mainly lists variables
that correlate with the more or less disturbed soils (ranging from conventional
and organic agricultural soils) or favourable conditions to eradicate the disease. This
paper suggests that indicators of soil health and disease suppression could be found by
monitoring the responses of Rhizoctonia solani in common bean and nutrient availability
for the application of a disturbance or stress. Generally these results show a
greater impact on systems (state and private) conventional handling and less impact
on those systems had an agro-ecological management. This approach illustrates the
responses of this fungus with respect to soil management in calcareous soils brown,
after incorporation of a crop on this soil. In this research, the incidence was higher
when incorporated into the soil more of external products and disturbances in the soil
was higher, depending on these soil management in each of the evaluated systems.
Rot caused by Rhizoctonia solani was less severe in agroecological systems compared
to conventional systems which showed most affected although all soils tested
cobdujeron disease greater or lesser degree. These results suggest that the proposed
finding indicators of soil health and disease suppression and resistance to disturbance
or stress approach is promising.
Wed, 21 Sep 2016 00:00:00 GMThttp://dspace.uclv.edu.cu:8089/handle/123456789/104302016-09-21T00:00:00ZEffect of Soil Management on Mites and Springtails Populations in Agroecosystems from Santa Clara, Cuba.http://dspace.uclv.edu.cu:8089/handle/123456789/10429
Effect of Soil Management on Mites and Springtails Populations in Agroecosystems from Santa Clara, Cuba.
Hernández Arboláez, Héctor Pablo; Aguila Alcantara, Edith; Ruiz González, Yanetsy
Tielkes, Eric
For assessing the effect of soil management on mites and springtails were selected
twelve farms located on brown calcareous soil in Santa Clara, Cuba. Farms were
grouped according to their soil practices and landownership, resulting in three groups:
State farms run under conventional agriculture, private farms managed conventionally,
and private farms organically managed. Besides, there were chosen three reference
patterns (Pasture, Marabou and Natural), all under homogeneity edaphic and climatic.
Two or three fields of each farm were selected for the study. Four composite soil samples
per field were taken to 20 cm of depth. Sampling was done twice: November,
2015 and June, 2017 in order to study the dry and the rainy season. The analyses
of mites and springtails were done by the Bayer’s methodology (2006). For the extraction
of the mesofauna components, 300 g of soil were placed in modified Berlese
funnels, which separated the organisms from the soil by entrapping them in alcohol.
Generally, mites and springtail populations are lower in soils under agriculture. In
both seasons, the higher number of mites and springtails were found in the marabou
and in the natural forest, without difference with the pasture area. The farms under organic
management showed populations lower than these references areas, but higher
and significantly different from those farms under conventional agriculture. No significant
differences were found between the fields under conventional farming, either
from the private or state sectors. It can be assumed that the organic management diminished
the negative effect of agriculture on soil mesofauna. The structure of the
mites’ community showed that Oribatid was the most abundant order and never was
below 60 %, followed by Mesostigmata and Gasamids. The Prostigmatide was the order
with low populations. In the springtails’ group, the family Isotomidae presented
the highest number of individuals and the lower was found in the family Entomobrydae.
These results suggest that the effect of soil management in agricultural systems
showed influence on soil mesofauna component used as indicators for determine soil
health.
Wed, 19 Sep 2018 00:00:00 GMThttp://dspace.uclv.edu.cu:8089/handle/123456789/104292018-09-19T00:00:00Z